My cummins is throwing this code P0251. Its saying the code is, CP3 Pump Regulator Control.
Help me out here. what does this mean?
Thank you very much

 

I got the same one a couple days ago. Don't know anything about it.

 

the truck still runs good just seems like when i push the gas down more it falls on its face, but then sometimes he will run great

 

might be your CP3 failing

 

Typically you can replace the FCA ( fuel control actuator) and take care of this problem.

SUBJECT:
Electronic Fuel Control (EFC) Actuator Available For Service
OVERVIEW:
This bulletin involves replacing the EFC Actuator.
MODELS:
2003 - 2005 DR/DH Ram Truck
NOTE: This bulletin applies to vehicles equipped with a Cummins Turbo Diesel
(sales code ETC or ETH).
SYMPTOM/CONDITION:
Engine surges at idle.
DIAGNOSIS:
ENGINE SURGES AT IDLE
Possible Causes
Fuel Supply System
Injection System
Fuel Return
Intake System
Other Vehicle Systems
Base Engine
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.
1. DTC's - Check for any Diagnostic Trouble Codes (DTC's) present. - Are there any
DTC's stored or active?
a. Yes >> Repair as necessary before proceeding further with this bulletin.
b. No >> Go to Step #2.
NUMBER: 14-004-05
GROUP: Fuel
DATE: July 8, 2005
2. Verify complaint - Verify proper fuel quality, grade, and level in the vehicle. Using the
DRBIII®, log the fuel pressure set point and fuel pressure. Operate the engine at idle
speed. A good system will have actual fuel pressure that is +/- 500 PSI from the set
point. (Example: If the fuel pressure set point at idle is 6500 PSI, the actual fuel
pressure on a good system is expected to be between 6000 - 7000 PSI). If fuel
pressure variation is excessive, an audible surge will be present. If the variation is
severe, a slight engine speed variation may also be noticed. - Does the fuel rail
pressure fluctuate more than +/- 500 PSI?
a. Yes >> Go to Step #3.
b. No >> Go to Step #7.
NOTE: A loud “knock” and black smoke that exists with a pressure drop may be an
injector issue and should be identified using single cylinder cut-out test.
3. Verify proper low pressure fuel supply to the injection pump. Perform the “In Tank
Fuel Lift Pump Flow Test - Diesel”. In a good system fuel flow of 430 mL in 10 seconds
or better is expected. Be sure there is no air in the system. Is the low pressure fuel
supply sufficient?
a. Yes >> Go to Step #4.
b. No >> Repair the low pressure fuel supply system. Refer to the detailed diagnostic
information available in TechCONNECT under: Service Info, 9 - Engine, Diagnosis
& Testing, Fuel Lift Pump - Diesel. - This bulletin does not apply.
4. Verify High Pressure Fuel Pump Performance. - Remove the fuel pump to rail high
pressure fuel line. Inspect the fuel pump outlet port for rust, debris, or other sign of
contamination. - Is contamination present?
a. Yes >> Go to Step #6.
b. No >> Go to Step #5.
5. Verify fuel injection pump flow. - Route the high pressure fuel line to a graduated
container. Crank the engine until fuel exits the line (with the discharge line routed to
atmosphere, fuel will discharge at 0 PSI). Crank the engine for three 10 second
intervals, pausing to allow the starter to cool between each crank event. Fuel flow
specification is based on engine cranking speed. 1. Minimum fuel pump flow at 150
RPM; 70 mL in 30 seconds. 2. Minimum fuel pump flow at 200 RPM; 90 mL in 30
seconds. Is the fuel flow sufficient?
a. Yes >> Go to Step #8.
b. No >> Step #6.
6. This bulletin does not apply. Replace the fuel injection pump. Check for source of
water to prevent future complaints. Refer to the detailed service information available
in TechCONNECT under: Service Info, 14 - Fuel System, Fuel Injection, Fuel Injection
Pump.
7. Further diagnosis is necessary. This bulletin does not apply. Refer to SB
14-003-05.
8. Perform the Repair Procedure.
PARTS REQUIRED:
Qty. Part No. Description
1 05183245AA Actuator

 

Just a friendly piece of advice ... if you say "gas" more than a few times while posting on DTR, the administrators might ban you, it's FUEL

hahaha ... couldn't resist ... hope you get the truck ironed out soon ...

 

How much does a FCA cost?
Where can i get one?

 

FCA can be bought from the dealer....the part number is listed above. They can also be bought from cummins, but I don't know the number. They are usually under $100.

 

ha ha ha, check the electrical connection to your CP3. mine was disconnected somehow??

 

how hard is it to put a FCA on?

 

2 screws that can be pretty tight. It comes with new ones.....make sure to use them! They can get stripped some when taking them out, and then next time you'll really be cursing!

 

Mine did the same thing, but it wouldn't start unless you gave it a shot of either. Replaced the lift pump with a Airdog Fp-100 and it now starts right up and has more throttle responce. Should have bought one of those 80,000 miles ago.

 

My 2004 cummins is showing the same code and the check engine light is on. It shows code p0251, did replacing the fca fix the problem?.

 

Cummins part #4932457 is the FCA, however it may be the Cascade valve(COV), that would explain "falling on it's face".

Here's a good link describing it:http://www.cumminsforum.com/forum/3r...mp-system.html

 

All I know is that about every 3 months or so I will be driving down the interstate and the pickup will cut out real briefly and the check engine light will be on for about 2 weeks then it goes away, I will also notice a drop in power. I can check the codes and it always shows up as the p0251. Im hoping all it is the the fca.